Mazda B-Series 1997 Workshop Manual page 490

ON-BOARD DIAGNOSIS SYSTEM
STEP INSIPECTION ACTION
12 Key OFF.
Disconnect scan tool or NGS from data link connector.
Disconnect sensor connector where VREF check failed.
Install breakout box, leave PCM disconnected.
Measure resistance between SIG RTN circuit at
breakout box.
appropriate sensor connector and SIG RTN test pin 91 at
Is resistance less than 5.0 ohms?
.
13 Key OFF.
Disconnect scan tool or NGS from data link connector.
Install breakout box, leave PCM disconnected.
Measure resistance between battery negative terminal
and PWR GND test pins 51/76/77/103 at breakout box.
Is each resistance less than 5.0 ohms?
-~
.
14
Key OFF.
Connect PCM to breakout box.
Measure resistance between SIG RTN test pin 91 and
- -
PWR GND test pins 51/76177/'103 at breakout box.
Is each resistance less than 5.0 ohms?
- .
15
i
Key OFF.
/
Disconnect sensor connector vvhere VREF check failed.
Disconnect TP and DPFE sensor connectors.
Disconnect PCM connector.
Key ON, engine off.
Repair VREF short to power in harness.
Measure voltage between VREF circuit at TP sensor
connector and battery negative terminal.
6BUOFT-093
(VIEW FROM
PIN
SIDE)
TP SIG
TEST PIN 89
GYMl
SIG RTN
TEST PIN 90
THROmLE POSITION SENSOR
CONNECTOR (TP)
TEST PIN 83
TEST PIN 7 1
TEST PIN 97
IDLE AIR
A
FROM POWER
RELAY
DIFFERENTIAL
TEST PIN 65
SDPFE
S I G - - BRILG
PFE (DPFE)
SENSOR
TEST PIN 91
SSIG
RTN GYlR CONNECTOR
TEST PIN 90
&VREF B R M l
-TEST PINS LOCATED ON BREAKOUT BOX
FT-I 45